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sqlpp11/tests/mysql/usage/Sample.cpp
Roland Bock 91b7b34557 Fix broken test code, see #400
2021-12-11 19:31:25 +01:00

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/*
* Copyright (c) 2013 - 2016, Roland Bock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "TabSample.h"
#include <sqlpp11/mysql/mysql.h>
#include <sqlpp11/sqlpp11.h>
#include <cassert>
#include <iostream>
#include <vector>
namespace mysql = sqlpp::mysql;
int Sample(int, char*[])
{
sqlpp::mysql::global_library_init();
auto config = std::make_shared<mysql::connection_config>();
config->user = "root";
config->database = "sqlpp_mysql";
config->debug = true;
config->connect_timeout_seconds = 5;
try
{
mysql::connection db(config);
}
catch (const sqlpp::exception& e)
{
std::cerr << "For testing, you'll need to create a database sqlpp_mysql for user root (no password)" << std::endl;
std::cerr << e.what() << std::endl;
return 1;
}
try
{
mysql::connection db(config);
db.execute(R"(DROP TABLE IF EXISTS tab_sample)");
db.execute(R"(CREATE TABLE tab_sample (
alpha bigint(20) AUTO_INCREMENT,
beta varchar(255) DEFAULT NULL,
gamma bool DEFAULT NULL,
PRIMARY KEY (alpha)
))");
db.execute(R"(DROP TABLE IF EXISTS tab_foo)");
db.execute(R"(CREATE TABLE tab_foo (
omega bigint(20) DEFAULT NULL
))");
assert(not db(select(sqlpp::value(false).as(sqlpp::alias::a))).front().a);
const auto tab = TabSample{};
// clear the table
db(remove_from(tab).unconditionally());
// Several ways of ensuring that tab is empty
assert(not db(select(exists(select(tab.alpha).from(tab).unconditionally())))
.front()
.exists); // this is probably the fastest
assert(not db(select(count(tab.alpha)).from(tab).unconditionally()).front().count);
assert(db(select(tab.alpha).from(tab).unconditionally()).empty());
// explicit all_of(tab)
std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
select(all_of(tab)).from(tab);
std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
db(select(all_of(tab)).from(tab).unconditionally());
std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
{
std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
std::cerr << "row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
<< std::endl;
};
// insert
db(insert_into(tab).default_values());
const auto x = select(all_of(tab)).from(tab).unconditionally();
const auto y = db.prepare(x);
for (const auto& row : db(db.prepare(select(all_of(tab)).from(tab).unconditionally())))
{
std::cerr << "alpha: " << row.alpha.is_null() << std::endl;
std::cerr << "beta: " << row.beta.is_null() << std::endl;
std::cerr << "gamma: " << row.gamma.is_null() << std::endl;
}
db(insert_into(tab).set(tab.beta = "kaesekuchen", tab.gamma = true));
db(insert_into(tab).default_values());
db(insert_into(tab).set(tab.beta = "", tab.gamma = true));
// update
db(update(tab).set(tab.gamma = false).where(tab.alpha.in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
db(update(tab).set(tab.gamma = true).where(tab.alpha.in(1)));
// dynamic insert
auto dynin = dynamic_insert_into(db, tab).dynamic_set(tab.gamma = true);
dynin.insert_list.add(tab.beta = "cheesecake");
db(dynin);
// remove
{
db(remove_from(tab).where(tab.alpha == tab.alpha + 3));
std::cerr << "+++++++++++++++++++++++++++" << std::endl;
for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
{
std::cerr << __LINE__ << " row.beta: " << row.beta << std::endl;
}
std::cerr << "+++++++++++++++++++++++++++" << std::endl;
decltype(db(select(all_of(tab)).from(tab).unconditionally())) result;
result = db(select(all_of(tab)).from(tab).unconditionally());
std::cerr << "Accessing a field directly from the result (using the current row): " << result.begin()->alpha
<< std::endl;
std::cerr << "Can do that again, no problem: " << result.begin()->alpha << std::endl;
}
// transaction
{
auto tx = start_transaction(db);
auto result = db(select(all_of(tab), select(max(tab.alpha)).from(tab)).from(tab).unconditionally());
if (const auto& row = *result.begin())
{
long a = row.alpha;
long m = row.max;
std::cerr << __LINE__ << " row.alpha: " << a << ", row.max: " << m << std::endl;
}
tx.commit();
}
TabFoo foo;
for (const auto& row : db(select(tab.alpha).from(tab.join(foo).on(tab.alpha == foo.omega)).unconditionally()))
{
std::cerr << row.alpha << std::endl;
}
for (const auto& row :
db(select(tab.alpha).from(tab.left_outer_join(foo).on(tab.alpha == foo.omega)).unconditionally()))
{
std::cerr << row.alpha << std::endl;
}
auto ps = db.prepare(select(all_of(tab))
.from(tab)
.where(tab.alpha != parameter(tab.alpha) and tab.beta != parameter(tab.beta) and
tab.gamma != parameter(tab.gamma)));
ps.params.alpha = 7;
ps.params.beta = "wurzelbrunft";
ps.params.gamma = true;
for (const auto& row : db(ps))
{
std::cerr << "bound result: alpha: " << row.alpha << std::endl;
std::cerr << "bound result: beta: " << row.beta << std::endl;
std::cerr << "bound result: gamma: " << row.gamma << std::endl;
}
std::cerr << "--------" << std::endl;
ps.params.gamma = false;
for (const auto& row : db(ps))
{
std::cerr << "bound result: alpha: " << row.alpha << std::endl;
std::cerr << "bound result: beta: " << row.beta << std::endl;
std::cerr << "bound result: gamma: " << row.gamma << std::endl;
}
std::cerr << "--------" << std::endl;
ps.params.beta = "kaesekuchen";
for (const auto& row : db(ps))
{
std::cerr << "bound result: alpha: " << row.alpha << std::endl;
std::cerr << "bound result: beta: " << row.beta << std::endl;
std::cerr << "bound result: gamma: " << row.gamma << std::endl;
}
auto pi = db.prepare(insert_into(tab).set(tab.beta = parameter(tab.beta), tab.gamma = true));
pi.params.beta = "prepared cake";
std::cerr << "Inserted: " << db(pi) << std::endl;
auto pu = db.prepare(update(tab).set(tab.gamma = parameter(tab.gamma)).where(tab.beta == "prepared cake"));
pu.params.gamma = false;
std::cerr << "Updated: " << db(pu) << std::endl;
auto pr = db.prepare(remove_from(tab).where(tab.beta != parameter(tab.beta)));
pr.params.beta = "prepared cake";
std::cerr << "Deleted lines: " << db(pr) << std::endl;
for (const auto& row : db(select(case_when(tab.gamma).then(tab.alpha).else_(foo.omega).as(tab.alpha))
.from(tab.cross_join(foo))
.unconditionally()))
{
std::cerr << row.alpha << std::endl;
}
}
catch (const std::exception& e)
{
std::cerr << "Exception: " << e.what() << std::endl;
return 1;
}
return 0;
}
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